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Related Experiment Videos

The kinematic rotating hinge prosthesis for complex knee arthroplasty.

B D Springer1, A D Hanssen, F H Sim

  • 1Department of Orthopedics, Mayo Clinic and Mayo Foundation, Rochester, MN 55905, USA.

Clinical Orthopaedics and Related Research
|November 22, 2001
PubMed
Summary
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The bone & joint journal·2019

The Kinematic Rotating Hinged knee prosthesis is useful for complex knee replacements but has a high complication rate. It should be reserved as a final salvage option due to concerning outcomes.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Complex primary and revision total knee arthroplasty (TKA) present significant challenges.
  • Severe bone loss, ligamentous instability, and periprosthetic fractures often require specialized implants.
  • The Kinematic Rotating Hinged knee prosthesis is designed for these complex cases.

Purpose of the Study:

  • To evaluate the long-term outcomes of the Kinematic Rotating Hinged knee prosthesis in complex primary and salvage revision TKA.
  • To assess the complication rates and functional results associated with this specific hinged prosthesis.

Main Methods:

  • A retrospective study of 58 patients (69 knees) treated with the Kinematic Rotating Hinged knee prosthesis.
  • Follow-up averaged 75.2 months, assessing range of motion and Knee Society Knee scores.

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  • Indications included severe bone loss, instability, fractures, infection, and congenital deformities.

    • Main Results:

    • Significant improvements in knee extension and flexion were observed postoperatively.
    • Knee Society Knee scores improved from an average of 40.3 to 77 points.
    • A high complication rate was noted: 32% of patients experienced at least one complication, with deep infection (14.5%) being most common.

    Conclusions:

    • The Kinematic Rotating Hinged knee prosthesis can be effective for highly complex knee arthroplasties.
    • However, the high incidence of complications and poor outcomes is a significant concern.
    • This hinged prosthesis should be considered a final salvage option for the most challenging cases.